Taxonomic Study of the Genus Augustinus Korotyaev from Japan (Coleoptera: Curculionidae: Ceutorhynchinae)

Abstract

A new species of the genus Augustinus Korotyaev, 1981 (Cnemogonini, Ceutorhynchinae) is described. Five Japanese species including the new species are studied taxonomically and classfield into the following threespecies groups: the longipes-group contains Augustinus longipes (Korotyaev, 1981) and A. coes sp. nov., and is characterized mainly by the sinuate and hind tibiae, and the ventrally prominene netasternal receptacle; the bouvieri-group consisting of Augustinus bouvieri (Hustache, 1916) and A. similis (Chujo, 1959) is similaar to the longipes-group in faving the robust rostrum with a median slit and the smooth prominences on the pronotum, but differs from it in having the clavate and dentate mid femora, the smooth internal margins of the mida and hind tibiae, and the flat metasternum; thw sasakii-group consists of A. sasakii (Chujo, 1959) and is cleary different from the other two groups in possessing the slenderer rostrum with a median ridge and the denticulate prominences in the pronotum. A key the Japanese species in provided, in addition to habitus photographs and line drawing on important features for each species with the exception of A. sasakii, as well as biological notes on the three species that are associated with Leucoceptrum (Lamiaceae).